DeathLog

DeathLog tracks your deaths in all worlds and servers. It does this completely client-side and records important metadata like coordinates, dimension and even your entire inventory. Since version 0.2.0 onward, DeathLog can also operate server-side and track all deaths of all players on that server, with native functionality for restoring a death snapshot. DeathLog can be used on both sides without being required on the other, however managing the server's database is significantly easier with a DeathLog-enabled client.
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You can access your log from the vanilla Statistics screen. The search bar accounts for

• Item Names
• Coordinates
• World or Server Names
• Death Messages
• ...

You can get your lost items back while in creative mode by simply clicking on them with your mouse wheel. Should you not have access to creative mode, it will copy an appropriate /give command